Halvedelsteiner
notation: 553.87
type: Concept
narrower: Opaler

Opaler
notation: 553.873
broader: Halvedelsteiner
alternative label: Opaler--økonomisk geologi
created: 2010-02-04
in scheme: Norsk WebDewey
type: Concept
modified: 2018-07-26

Norsk WebDewey
type: ConceptScheme